#define _CRT_SECURE_NO_WARTNINGS
#include<stdio.h>
int main(void)
{
	int i = 0, j = 0, m = 0;
	char n = 'A';
	for (i = 0; i < 6; i++)
	{
		for (j = 0; j <= i; j++)
		{
			n = 'A' + m;
			m++;
			printf("%c", n);
		}
		printf("\n");
	}

	return 0;
}